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https://issues.apache.org/jira/browse/SLING-7241?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16253239#comment-16253239
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Nicolas Peltier commented on SLING-7241:
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thx [~bcsott] for the issue & PR!
i think [~kpauls] the issue is correlated with SLING-7134, but i'm not sure it
would fix it. Anyway specifying system classloader might be a good idea to
avoid future headaches about why nahshorn is not here in pipes case.
[~bcsott] could you add some comment explaining the choice of the engine
manager (something like "we take the system classloader's engine manager to
ensure consistent execution of pipes across contexts")
> [pipes] Nashorn ScriptEngine in PipeBindings is null
> ----------------------------------------------------
>
> Key: SLING-7241
> URL: https://issues.apache.org/jira/browse/SLING-7241
> Project: Sling
> Issue Type: Bug
> Components: Extensions
> Affects Versions: Pipes 1.0.4
> Environment: java.runtime.name = Java(TM) SE Runtime Environment
> java.runtime.version = 1.8.0_144-b01
> Reporter: Björn Csott
> Priority: Minor
> Attachments: error.log
>
>
> Under some unclear circumstances the ScriptEngine in PipeBindings does not
> get initialized.
> There is a solution out there to attach Nashorn to the system bundle. Appart
> from that I was able to fix it by using a different constructor:
> ScriptEngineManager(null).
> The issue can be reproduced by deploying
> https://github.com/bcsott/migration-tool
> When it fails the following is written to stderror.log:
> ScriptEngineManager providers.next(): javax.script.ScriptEngineFactory:
> Provider jdk.nashorn.api.scripting.NashornScriptEngineFactory not found
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